How much does Microsoft 365 Copilot Business cost?
Microsoft 365 Copilot Business costs $18.00 per user per month paid yearly if you buy it by December 31, 2026, and $21.00 per user per month at list. Paid monthly it is $25.20. It is an add-on, so you pay for a Microsoft 365 business plan as well, and it covers up to 300 users.
The card on microsoft.com reads "Originally starting from $21.00 now starting from $18.00 user/month, paid yearly." The footnote behind the asterisk is where the terms live. Microsoft says the discount "is available between July 1, 2026, and December 31, 2026", that the add-on "is available only to existing Microsoft 365 customers with an eligible Business plan", that "an annual commitment is required, and promotional pricing applies to the first year only", and that the promotion is not available on trial subscriptions.
Read together, that means an $18 seat bought this quarter becomes a $21 seat at the first renewal. That is a 17 percent increase already written into the contract. Put the $21 figure in your year two budget now, not when the renewal notice arrives.
Two smaller terms are worth knowing before you click buy. There is a one month free trial, and Microsoft requires a credit card to start it; the trial converts to paid automatically. After a paid subscription starts, Microsoft gives a seven day window to cancel for a prorated refund.